Garbage-incinerator.



J. PRESGOTT. GARBAGE INCINERATOR. APPLIOATION FILED AUG. so, 1911.

Patented Feb. 10, 1914.

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J. PRESCOTT. GARBAGE INGINERATOR. APPLICATION FILED AUG. so, 1911.

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cSSe/lresooj J. PRESCOTT.

GARBAGE INGINERATOR.

APPLIGATION FILED AUG. so, 1911.

Patented Feb. 10, 1914.

3 SHEETS-SHEET 3.

JESSE PRESCOTT, OF WEBSTER, MASSACHT'J'SETTS.

GARBAGE-INCIERATOR.

Spetcaton of Letters Patent.

rammed Feb. 1o, 1914.

Application led August 30, 1911. Se'rial No. 646,776.

1/ o all 111720712 'it may concern.:

le it known that I, JESSE Pnnsco'r'r, -a citizen of the United States,and resident of Webster, in the county of lVorcester and State ofh/liissachusetts, have invented an Improvement in Garbage-Iiicinerators,of which the following description, in connection with theaccompanyingdrawings, is a spcciiication, like letters on the drawings representinglike parts. v

This invention relates to iiicinerators of a type adapted fordomesticinstallation and for use in hospitals and like public insti!tutioiis for the incineration and consumption of garbage and othermiscellaneous refuse on .the spot instead of requiring the same to becai-ted' away at frequent intervals.

The invention provides a garbage receptacle adapted toconsume garbageand like matter with or without auxiliary heating means, and withprovision for a preliminary dryiiig-out of the garbage during theinterval that it may be left in the receptacle be- 4fore burning.

More particularly, the invention consists in an improved construction ofgarbage holding receptacle and arrangement of circulatory flues thereinof the type shown and claimed broadly in my copending appl-icationSerial No. 708,512, filed March 14, 1911.

Other features of invention relate to an improved burner arrangement inconnection with the flue construction, to 'a novel arrangement of thedoors, and to other detail `matters which will hereinafter more fullyappear.

The invent-ion will be better understood from the followingdetaileddescription,

taken in connection with the accompanying drawings, and will bethereafter pointed out in the appended claims.

Referring to the drawings, Figure 1 is a central vertical section of oneform of the invention, a portion being broken away;-

F ig. 2 is a fragmentary plan showing the sectional vertical grate top,this being partly in section; Fig. 3 is a fragmentary horizontal sectionon line 3-'3 of Fig. 1;-

F ig. 4 is a fragmentary section on line 4 4.-

of Fig. 1; Fig. v5 is a `fragmentary vertical section on line 5-5 ofFig-2; Fig. 6 isa central vertical section of another form of Atheinvention; Fig. 7 is a fragmentary front view of the lower Ventilatingdoor; Fig. 8 is a horizontal section on line 7--7 of Fig. 6; and Fig. 9is a section'shpwing the interlocked arrangement of the doors when,

openedto clean out the receptacle, this section being taken on line 8- 8of the dotted lineportion of Fig. 8'.

Referring first to Figs. 1 to vthe receptacle as shown is of arectangular upstand- A ing form with an inner casing 1 and an outershell 2 spaced apart therefrom, the

lower portion of the inner casing being enlarged from an intermediateshoulder 3 'on downward to provide greater holding capacity in thereceptacle. A suitable base 4 is provided, this having a flat'bottom toreceive an ash pan 5. Formed at one side of this bottom portion of thereceptacle is an opeiiing' ofa size to permit removal of the ash pan andthis is normally closed'by av door 7 This door is formed as a skeletonframe having the central portions fitted with a ne mesh screen 8 topermitentrance of air for circulation up through the garbage mass asmore particularly explained farther oii. A iiat horizontal grate 9 restson a ledge 9 projecting inwardly from the inner casing at a lowerportion thereof, and this grate has a series of radial slots 10. and acentral aperture 11 to receivefthe central gas burner. This horizontalgrate has interfitted, with its peripheral portion an openwork verticalgrate 12 engaged with the Abot-v tom grate by having lugs 13 thereon eX-tending' into apertures 14 in the bottom grate and the grate 12 thenceextends vertically upward with atop iange 15 to iit against'the `wallsof the inner casing at the inner extremity of the shoulder 3. 'I hisvertical grate is generally rectangular in forni and spaced away fromthe walls of the inner casingbut its corners are flattened to lieinspaced apart relation to the corner flue plates 18 to be laterdescribed. This vertical grate has a series of openings 16 extend ingsubstantially throughout the height A thereof and is preferably formedVin a number of 1sections shown as four, the divisional lines beingindicated at 17.- By virtue of this construction vthis vertical gratecanbe readily removed from the receptacle for cleaning or other purposes asrequired.l

Vertical flues are provided to extend-up through the receptacle and inorder to leave practically the entire interior of the receptacleunobstructed, I form these lues by fixing plates 18 diagonally acrossthe corners of the casing. These plates at the shoulder 3 of the innercasing areA sloped outward as seen at 19 so as to fit the corners of theen? larged lower portion of the casing as at 20. The flue plates 18 haveformed in their sloping portions 19 adjacent the top of the verticalgrate 12 slot openings 21 which, it will beobserved, are protected frombeing clogged up, both because they are under the shoulder 3 andbecausek the top Hange 15 of the grate extends around the casing justabove them. Other openings 22 may be formed at intervals along theheight of these plates. A gas burner 23 is fitted to the centralaperture 11 of the bottom grate and is formed with an upwardly divergingconical ortion-24 having a series of burner openings 25 therein, andthereabove with an .upwardly converging cone top 26 extending well upinto the receptacle. This cone top has a downwardly and outwardlyextended shroud or baille 27 depending down below the burner openings 25and adapted to divert the flame therefrom downwardly and outwardly sothat it is thence directed and drawn to encompass the bottom and sidesof the garbage mass. The burner may be supplied with gaseous fuel by aconnector pipe 28 having any desired form of mixer attachment 29 at thecasing entrance. A suitable exit liue or stack connection 30 is formedin the upper part of the apparatus to have joined thereto any suitablestack.

Referring to Fig. 6, the inner and outer casings 1', 2', are generallysimilar to the form just described with a similar base 4', ashpa'n 5 andlower Ventilating door 7'.

This form likewise has substantially similar corner fines formed byplates 18' having at intervals in the height thereof slot openings 22.In this form, a led e support 31 is fixed in the lower portion o theeasing, and on this rests a back fixed grate portion 32 and a frontswinging grate portion 33, this swinging portion being shown as ofsomewhat larger vextent than the fixed portion, and hinged at 34 so asto drop downward to permit dumping of the grate when the rest pin 35 ispulled out by means of itsoutwardly exten ing knob 36 so as to releasethe` front edge of the grate. The pivotal axis 34 may be extendedthrough the casing, with a squared end 34 to receive an operatinghandle. Directly over this grate is a ring burner 37 having a series ofburner holes 38 pointing inward, this ring burner having a suitableinlet connection 39. This ring burner extends around in close proximityto the walls of the casing as shown, and is protected byan outwardlyflaring annular baille plate 40 which fits theinner walls ofthe casingand the plates 18' and thence slopes downwardly inward well over thering burner. The line plates 18'extcnd down to this annular baille orbelow it, and the lowermost` of the slot'openings 22' are only a m5short distance above this balile, as shown.

An important fea-turc of the invention relates to a novel arrangement olthe registcn ing doors which are fitted to the inner casing and outershell; and, while these may he arranged on either form of the intention,they are shown more completely in Figsp, 8 and 9. A single inner door 41is mounted on a horizontal pivot 42 near the bottom ogt' the garbageholding portion of the receptacle to cover an opening 43 in the innercasing1 ot' the receptacle, and has a pivotcd latch A'l--L at its top toengage a lixed catch The outer shell has an opening 46 registering withthe opening 43, and this is closed by two doors 47, 48 mounted onvertical pivots 49, 50 on the outer shell. The inner door 41 has at ritssides downwardly extended flanges 51 adapted to take over and interilock with lugs 52 extending inwardly and upwardly from the bottom of theouter doors 47, 48 when the doors are opened, thus forming a tight chutethrough which the ashes and residue of the burning may be raked from thereceptacle into an ash can for removal. It is to be noted that no'special manipulation or effort is required for thus interlocking theinner door 41 with the outer doors 47, 48 to 'toi-in this chute butthat, as the outer doors are opened and the inner door swung down, itsflanges 51 automatically interlock with the lugs 52 which furnish a'reliable support therefor and at the same time hold the outer doorswhich form the sides of the chute from opening farther to spread awayfrom their coperative position in forming the chute.

As a means for the introduction of garbage to the receptacle, a swingingvchute door 53 is pivoted at 54 near-.the top of the casing, t is havingan inner skeleton wing 55 joined to 'a closing plate 56 by the sideplates 57. The closing plate 56 has mounted thereon in spaced apartrelation thereto a baille plate 58, this being, as shown, cupped out forits peripheral Aflange to be fitted against the late 56. The peripheralflange of this ba e plate is preferably recessed out or cut away sol asto leave supporting. lugs 59 at intervals, with intervering spaces so asto permit freecirculation of air between the balile plate and plate 56,so that the baille plate is kept cool. A suitable handle 60 is fixed tothe baille plate 58.

In use, the more combustible forms ol refuse may be lburned in thereceptacle without the aid ofthe gas'burner, particularly if thematerial to be vburned be leftsome little time -to dry out. For thispurpose, and whether the gas flame is to be used finally for initiatingthe combustion or not, the Ventilating lower door is of/specialimportance in that it permits currents of air .to enter at the'bottolnof the -casing and to be drawn up through the. refuse mass to 13o 'oft-he gas burner for its consumption, the

annulusof iame from the circular series of burner openings is projecteddownwardly and outwardly through the openworlc grate vsoV and up thevertical sides of thegrate portion l2, in the form shown in Fig. 1. Byreason of the spaced apart relation of the vertical grate 12 to theinner casing and arrangement of theflue openings 21 so as to beprotected from clogging up by the fiange 15 and the shoulder 3 asdescribed, gaseous products of combustion from they start find arelatively restricted but sufficient outlet down through or along-thebottom grate4 10 and up the annular space between the vertical grate 12and the inner casing, and thence through the openings 21 up into thecorner fines, -thus encompassing and impinging upon all exposed portionsof the garbage mass through the openwork construction of the grates. Asthe garbage becomes 4dried rinkage in mass, and the combustion thereofcommences, the

out with a corresponding s gradual increase in fluepassages required isprovided by the increasing opening of the lower portions of the into thesurrounding annular space and thereafter by the uncovering of the upperholes 22 in .the corner flues if the `garbage lmass extends up that way.Thus 'the flue passages are more or less closely proportioned to thedraft requirements and the extent of combustion so that an effectivedraft is at all times created. It is to be understood 'that the conicalcap 26 extending up into the center of the garbage mass and being heatedto a vhigh degree by the gas flame un# derneath, materially aids in the.initial dry'- ing out of the central portion of the garbage mass. Inthe form shown in Fig. 6, the annulus of flame is iirst directed inward'from the'ring burner, converging `to the central' portion of theygarbage mass, but, as the ue openings which it must find for its initialescape are the lowest openings 22 into the corner fines near the bottomofthe garbage mass, it follows that the flame and heated currents willagain work their way and eat through the garbage mass outward, thusquickly heating and drying all portions thereof, the initial inwardimpetus of the fia-me causing the heat to reach the central` portionsofthe mass, while the outward draft of the 'corner fines againdisseminates and spreads the heat to the peripheral portions. rllhevertical grate 12 is formed in a convenient number of' sections -to beiue opening 1,6 outv with readily removed through the door openings 43,46 and, upon the lremoval-thereof, the receptacle space can be quicklyand easily cleaned out, thisl operation being.

facilitated by the interlocking construction of the side and bottomdoorsas 'before described. lVhile all of the several features of theinvention are thus interrelated andmntually contribute to produce aparticularly efficient .and practical -incinerator, it is to beunderstood that certain of said features are useful and valuable inother'relations, and the particular association of parts shown, asalso'the specific construction of the several elements, is to beunderstood as illustrative and not restrictive,

and it is further to be understood that the use of terms in thevforegoing description is not intended to limit the invention in anyparticular except as set forth in the appended claims.

Having described myl invention,f\vhat I claim as new and desire to tersPatent is:

1. An apparatus of the kind described, comprising an upright `angularcasing having corner flues formed therein, means for holding garbage inthe lower portion of said casing, including a -sectionalvertical gratemember spaced apart froml the casing about the periphery thereof, saidcasingbeing drawn inwardly adjacent the top of said vertical grate, andsaid corner flues having up-'and-down openings leading directly into theannular space around said vertical grate arranged to be protected fromclogging up when the apparatus is filled with garbage.

2.'An apparatus, of the kind described, comprising an upright receptacleformed with spaced apart inner and outer walls with registeringopenings, a grate in .the lower portion of said receptacle, a door forthe inner wall opening pivoted on4 a horizontalv axis, and a door-forthe outer wall opening pivoted on a vertical axis, said doorsbeing'formed and'arranged to interlock when in opened position toprovide a clean-out chute. A

3. An apparatus of the kind described, comprising an upright receptacleformed with spaced apart inner and outer`- walls with registeringopenings, a grate in the lower portion of 'said receptacle, a doorvforthe inner wall opening pivoted on a horizontal axis, and a pair of doorsfor the secure by Letouter wall opening'pivoted on vertical axes at thesides of said opening, said pair of doors `and the inner door. havingportions arranged to interengagewhen in opened position to formaclean-out chute.

4. An apparatus of the kind described, comprising an upright receptacle,formed with registering openings, a grate in the lower portion of saidreceptacle, a door for spaced apart inner and outerwalls 5 said spacefree when the doors are closed,

and ineens on said doors arranged to automatically interlock when thedoors are opened and hold the outer receptacle door in engagement withthe inner receptacle lodoor, whereby said doors form a vclean-out 5. Anapparatus of the kind described, comprising an upright receptacle ormedwith spaced apart inner and outer Walls 15 \vith registering openings, agrate in the lower portion of said receptacle, a door for the innerreceptacle opening pivoted on a horizontal axis, and a pair of doors forthe outer receptacle opening nornally entirely disengaged from saidfirst mentioned door and pivoted on vertical axes et the sides of saidopening, said vertically pivoted doors havinginwardly extending lugs andsaid inner receptacle door` having iianges ar- 'nnged to automaticallyinterlock with said lugs when thel doors are opened to hold the doorsrigidly assembled as a clean-out chute when thus opened. A y

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses;

JESSE PRESCOTT.

Vitnesses C. L. Roenes, EDWARD MAXWELL.

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